package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
@Slf4j
public class UserServiceImpl implements UserService {
    //微信服务接口地址
    public static final String WX_LOGIN="https://api.weixin.qq.com/sns/jscode2session";

    @Autowired
    private WeChatProperties weChatProperties;

    @Autowired
   private UserMapper userMapper;
    @Override
    public User wxLogin(UserLoginDTO userLoginDTO) {//微信登录
        //调用微信接口服务，获得当前用户的openid
        Map<String, String> map =new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code",userLoginDTO.getCode());//code授权码
        System.out.println("从小程序拿到的code:"+userLoginDTO.getCode());
        map.put("grant_type","authorization_code");

        String json =   HttpClientUtil.doGet(WX_LOGIN,map);//返回一个json字符串，类似于postman的用法
       JSONObject jsonObject= JSON.parseObject(json);//将json字符串转化成json对象
       String openid= jsonObject.getString("openid");//拿到openid
        System.out.println("openid:"+openid);
      // String openid=getOpenid(userLoginDTO.getCode());
        //判断openid是否为空，如果为空表示登录失败，抛出业务异常
        if(openid==null){//登录失败
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);

        }

        //判断当前用户是否为新用户
        User user=userMapper.getByOpenId(openid);
        //如果是新用户，自动完成注册
        if(user==null){//则该openid是新用户的
            user=User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();//是新用户，则构造user对象
            userMapper.insert(user);//将新用户自动注册，加入到数据库


        }

        //返回这个用户对象
        return user;
    }

//    private String getOpenid(String code){//将前面的操作抽取成为一个方法
//        //调用微信接口服务，获得当前用户的openid
//        Map<String, String> map =new HashMap<>();
//        map.put("appid",weChatProperties.getAppid());
//        map.put("secret",weChatProperties.getSecret());
//        map.put("js_code",code);
//        map.put("grant_type","authorization_code");
//
//        String json =   HttpClientUtil.doGet(WX_LOGIN,map);//返回一个json字符串，类似于postman的用法
//        JSONObject jsonObject= JSON.parseObject(json);//将json字符串转化成json对象
//        String openid= jsonObject.getString("openid");//拿到openid
//        return openid;
//    }

}
